Holding-down mechanism for rotary valves



- l 1927. I 1,616,022 Feb v R. F. BARKER V HOLDING'DOWN MECHANISM FORROTARY VALVES Original Filed Feb. 5. 1925 2 Sheets-Sheet 1 I Fb. 1 9

R. F. BARKER HOLDING-DOWN MECHANISM FOR ROTARY VALVES 1 Filed Feb. .5,1925 2 Sheets-Sheet 2 ,sists of a holding-down mechanism,

Patented Feb. 1, 1927.

units!) STArss REUBEN F. Brianne, or ronrtann, onneon.

HOLDING-DOWN MECHANISM FOR ROTARY VALVES.

Original application filed February 5, 1925, Serial No. 7,054. Dividedand this application filed July 13,

ing application entitled Rotary valve for internal combustion engineswhich was filed February th, 1925, and receiving Serial No. 7,054.

One of the main objects of my present invention is to provide meansadapted to hold that portion of the face of the valve which is adjacentthe seat of the cylinder port at the instant of explosion, firmlyagainst said portat least during the instant the gas is ignited in saidcylinders so as to prevent gas from escaping into the valve bore of thecylinders. Said means preferably cona part carried by the valve and apart carried by the bore of the cylinder, which is arranged toperiodically tend to move said valve to wards the cylinder port to seatthe same firmly in place and which preferably relieves the pressure dring other positions of the valve. I also show devices by which theentire valve is mounted eccentrically to the valve bore, the eccentricthrow being arranged to hold the valve in the herein such aposition thatit bears tightly against the port at all periods of the cycle. Saiddevices eliminate the frictional resistance of tight packing about saidvalve which would otherwise be required.

The further details of construction and the mode of operation of myinvention are hereinafter described with reference to the accompanyingdrawings, in which:

Fig. 1 is a longitudinal section through one of the valve elementsshowing the holding down devices at eacliend bearing upon the peripheryof said valve between two sealing rings; I 1 and 1 ar'erespectively'cross sections through one end of said valve and illustratediagrammatically two phases" of the holding down means provided forapplying pressure and resistance tothe periphery of said valveoppositethe cylinder pdrt, at the instant gasis ignite'dfsaid pressuretending to hold the valve closely ing 9 which constitutes a coveringSerial No. 43,289.

against its seat on said port, said pressure being relieved during theother positions of the valve;

Fig. 2 is a longitudinal section through one of said valves similar toFig. 1, but shows an alternative arrangement for holdin g the valve downtightly against the cylinder port to prevent leakage of gas from thebore of the cylinder in which the valve rotates;

Fig. 3 is a transverse section taken on the line 33 of Fig. 2, and

Fig. 4 is a transverse section taken on the line 4-4: of Fig.

My invention is shown as being embodied in one of the cylinders for aninternal .comb'ustion engine, the cylinder being designated as 1, thepiston 2 and the rotary valve 3. Said valve is journal'ed in atransverse bore of said cylinder, said bore communicatingwith theworking barrel of the cylinder through a cylinder port l. Said valvecarries a worm gear 5 which is connected to said valve through an Oldhamcoupling 6. Said worm gears 5 are carried upon a roller bearing 7, saidroller bearing being, mounted upon a hollow trunnion 8which is integralwith and extends laterally from the housfor said couplings, bearings,worm gears, and for the driving shaft 10 which carries the worm 10 whichmeshes with the worm gear 5. A tubular water conduit 11 from said valveis also jonrnaled in said housing 9 and pack ing 12 is arranged at bothsides of the radial outlets 18therein, as shown in Fig. 1. Said housingcarries a cooling fluid manifold 14;, as shown in said figure, saidmanifold being provided with outlets 14? which communicate with theradial outlets 18 which extend through the tubular conduit 11. Withinsaid tubular conduit 11 is a smaller sized conduit which has a flange 15at its outer extremity which completely fills the bore of the tubularconduit 11. The bore of said smaller tubular conduit 15 extendscompletely therethrough and forms a passageway for'theicooling fluidwhich is completely'separated-from the passageway formed about theperiphery. of the smaller conduit 15. The inlets 14E communicate withthe bore in said smaller sized conduit 15.

' The apertures 14 andflt in the cooling fluid manifold are located at apoint above the major part of the valve so that a substantial amount ofcooling fluid will be entrapped within the valve so that if the supplyof cooling fluid should become depleted, the cooling fluid thusentrapped would be sufficient to substantially cover the exposedportions of the valve.

The connection passageways 1 1 and le which connect said apertures 14and 14 with the respective outlet and inlet ends of the cooling fluidpassageway, are arranged vertically and constitute stand pipes adaptedto prevent the displacement. of the cooling fluid, as previouslyreferred to.

Each of said valves comprise a cylindrical body which is provided with apassageway 15 for the incoming gases. a passageway 16 for the exhaustgases, and a continuous passageway 17 adjacent said gas passageways orthe cooling fluid. The arrangement of the passageways in this mannerpermits the heat of the exhaust gases to be removed in part so as toprevent said excessive heat from binding said valves in their seats, dueto dis tortion.

As can be seen in Fig. 1, the intake passageway 15 in each of saidvalves occupy a cylindrical bore extending substantially through thevalve and terminates in a port 15. Said port opens to the periphery ofsaid valve and occupies a sector of said cylinder, which issubstantially one-fourth of the circumference. The exhaust passageway 16partially surrounds the intake passageway 15 and also terminates in aport which occupies substantially one-fourth of the circumference ofsaid valve.

The passageway for the cooling fluid comprises the bore of the conduit18, which terminates in the passageway 17, which permits the coolingfluid to circulate around the exterior of the exhaust conduit. Thecooling liquid is emitted through the radial holes 18 through the standpipe section 14 to the outlet aperture 16b in the manifold 14 for thecooling fluid. The passageway for said cooling fluid thus is continuousthrough the valve.

The cooling fluid enters and is emitted from points adjacent each otherat the same side of said valve. The passageway extends through the valvelongitudinally from one end to the other and doubles back upon itself.The passageway in said valve for the cooling fluid parallels thepassageway for the gases. Said passageways are arranged to remove asubstantial portion of the heat from the exhaust gases emitted by thecylinder and the exhaust passageway is ar ranged relatively to theintake passageway so that suiiicient heat is given thereto to partially,it not wholly gasify the combustible gases passing through said intakepassageway, thus to assist in the combustion thereof in the cy1inderj.-

As is shown in exaggerated fashion in Figs. 1, 1 and 1 portions 19 and20 at the ends of said valve member and at each side of the intake andoutlet ports in the valve are arranged eccentric relatively to theremainder of the valve. Said Figs. 1 and 1 exaggerate the clearancesbetween the valve and the bore for the purpose of illustration.

As shown in said figures, when the intakeand outlet ports are arrangeddiametrically opposite the cylinder port 1, the valve is arranged sothat the shoes 21 bear against the eccentric portions 19 and 20 and tendto move the valve towards the cylinder port 4, and thus hold said valvetightly against said port, to prevent leakage thereby. Said shoes 21 areadjustable by placing shims 22 of different thicknesses beneath theholding down brackets 23, said brackets being held in place by studs 24.

At each side of the intake and exhaust ports, I mount expansible sealingrings 25 to prevent leakage longitudinally of said valve. Said sealingrings are mounted at each side of the eccentric portions 19 and 20, andprovide an extremely etlieient sealing device without building upexcessive friction to retard the rotation of said valve.

In Figs. 2, 3 and 4:, I show an alternative arrangementby which thevalve 26 may be arranged relatively in the bore 27 in the cylinder 28,thereby to tend to seat tightly against the cylinder port 29 and thusprevent the escape of gases around said valve; In the devices shown insaid figures, the valve is arranged to rotate about an axis passingthrough the point a: which is not coincident with the axis of the borewhich passes through the point 1 Said valve 26 is mounted in tworemovable bearings 30 which are shown as containing balls 30 but it isto be understood that said removable bearings might consist of taperedroller bearings or sleeve bearings. Said removable bearings are mountedin recesses 31 at the ends of the bore 27. Said recesses are arrangedcccentrically, relatively to said bore, thus the valve rotates so thatall of its clearance with said bore is at the top of the valve, as shownin Fig. 4:. The amount of clearance between said valve and said bore isgreatly exaggerated and in practice would hardly exceed tenone-thousandths of an inch and would preferably be approximately aboutfive ono-thousandths of an inch. mounting the valve in this manner; asub stantial amountof clearance can be provided about said valve toprovide for easy running. but the valves fit very closely against thecylinderport to prevent leakage.

The pressure built up within the cylinder, due to the ignition andresultant expansion of the gases, tends to lift the valve ofi' of itsseat upon the cylinder port, and also tends to escape about said valve.

By i

I claim:

1. In an internal combustion engine cylinder, a rotary valve providedwith ports intermediate its ends, said valve operating in a herein thecylinder, said valve ports adapted to communicate with a port in thecylinder, cam-shaped devices and portions cooperating therewith carriedby said valve and said bore respectively, which are adapted to hold thatportion of the face of the valve adjacent the seat or" the cylinder portfirmly against said seat during the instant the gas charge ignites insaid cylinder.

2-. In an internal combustion engine cylinder, a rotary valve providedwith ports intermediate its ends, said valve operating in a bore in thecylinder, said valve ports adapted to communicate with a port in thecylinder, said valve being provided with a portion eccentric to saidbore, the eccentric throw being adapted to hold that portion of the faceof the valve adjacent the seat of the cylinder port firmly against saidseat during the instant the gas charge ignites in said cylinder.

In an internal combustion engine cylinder, a rotary valve provided withports inter-- mediate its ends a thrust-resisting element bearingagainst that face of the valve positioned opposite the cylinder port,said face of the valve and said thrust-resisting element beingrelatively formed to tend to hold the valve firmly against the seat ofthe cylinder port at the instant the gas charge is ignited, and torelieve the pressure of said thrust-resisting element on the valve inother positions of the latter.

In an internal combustion engine cylinder, a rotary valve provided withports 1nterm diate its ends, an adjustable thrustrcs. lug elementbearing against that face of the valve positioned opposite the cylinderport, said face of the valve and said thrustresisting element beingrelatively formed to tend to hold the valve firmly against the seat ofthe cylinder port at the instant the gas charge is ignited, and torelieve pressure of said thrust-resisting element on the valve in otherpositions of the latter.

5. In an internal combustion engine cylinder, a rotary valve providedwith ports intermediate its ends, a thrust-resisting element located ateach end of the cylinder exteriorly of said ports bearing against thatface of the valve positioned opposite the cylinder port, said face ofthe valve and said thrust-resisting element being relatively formed totend to hold the valve firmly against the seat of the cylinder port atthe instant the gas charge is ignited, and to relieve pressure of saidthrust-resisting element on the valve in other positions of the latter.

6. In an internal combustion engine cylinder, a rotary valve providedwith ports intermediate its ends, a thrust-resisting element located ateach end of the cylinder exterior of said ports bearing against thatface of the valve positioned opposite the cylinder port, said face ofthe valve and said thrust-resisting element being relatively formed totend to hold the valve firmly against the seat of the cylinder port atthe instant the gas charge is ignited, and to relieve pressure of saidthrust-resisting element on. the valve in other positions of the latter,said valve provided with circumferential expansion sealing rings at itsopposite ends exteriorly of the sides of said thrustresisting element.

7. In an internal combustion engine cylinder, a rotary valve, athrust-resisting element adapted to bear against that face of the valvepositioned opposite the cylinder port, said valve provided with acircumferential cavity in which said thrust-resisting element bears incertain positions of the valve, whereby the valve is held firmly againstthe seat of the cylinder port at the instant the gas charge is ignited,and in other phases is relieved of the pressure of said resistingelement.

8. In an internal combustion engine cylinder, a rotary valve, athrust-resisting element adapted to bear against that face of the valvepositioned opposite the cylinder port, said valve provided with acircumferential cam-shaped portion in which said thrust-resistingelement bears in certain positions of the valve, whereby the valve isheld firmly against the seat of the cylinder port at the instant the gascharge is ignited, and in other phases is relieved of the pressure ofsaid resisting element.

9. In an internal combustion engine cylinder, a rotary valve, athrust-resisting element adapted to bear against the face of the valvepositioned opposite the cylinder port,

said valve provided at each of its ends with a circumferential cavity inwhich said thrust-resisting element bears in certain positions of thevalve, whereby the valve is held firmly against the seat of the cylinder port at the instant the gas charge is ignited, and in other phasesis relieved of the pressure of said resisting element.

10. In an internal combustion engine cylinder, arotary valve providedwith ports intermediate its ends, said valve operating in a bore in thecylinder, said valve ports adapted to communicate with a port in thecylinder, cam shaped devices and portions operating therewith adapted tohold that portion of the face of the valve adjacent the seat of thecylinder port firmly against said seat during the instant the gas chargeignites in said cylinder.

BEUBEN F. BARKER.

